Self-propelled tank or redoubt for military use



F. w. CUNARD.

SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE. APPLICATIQN HLED Amma. 1919.

F. W. CUNARD.

SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE.

APPLICATION FILED`AUG. I5, I9I9.

1,342,943. Patented June 8, 1920 fad swans- Snam 2. I (5 2 2 116 7' 52' Tar-'I lv 27 I; I L f 24 '-'QJ 9. 125

58 "5 l {22 f2s Hfs 122 .n u l f F. `W. CUNARD. SELF PROPELLEDTANK 0R REDOUBTFOR MILITARY USE.

APPLICATION mso Aums, 1919.

Patented Jlllle 8, 1920.

9 SHEEIS-SHEET 3- F. W. CUNARD. SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE.

APPLICATION FILED AUG. I5, I9|9 n 1,342,943. PatentedJune 8,1920.

9 SHEETS-SHEET 4- F.1w. cuNARD.

SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE. APPLICATION FILED mais. Isls.

1,342,943. Patented June 8, 1920.Y 52 37 l Y 9 EETs-sHET 5.

F. W. CUNARD.

SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE. M'Pucmo man '/Iue. ls. Isls.

"III-*UNIIIIIINIIIIIU mh i 3 F. W. CUNARD.

SELF PROPE|:LED TANK'UR REDOUBT FOR MILITARY USE. APPLICATION mso Aucns, m9.

Patented June 8, 1920.

9 SHEETS-SHEET I.

F. W. CUNARD'.

SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE.. APPLICATION FILED mais. |919.

1,342,943. Pawnwune's,192o.

F. W. CUNARD.

SELF PROPELLED TANK 0R REDOUBT FOR MILITARY USE.

APPLICATION FILED AUGAS. 191s.

1,342,943. 'PatenaJune 920.'

9 SHEETS* 9.

:I HIJ UNITED STATES .PATENT-OFFICE.

rnnnnnrc WILLIAm cnn-Ann, or mivnnroon, ENGLAND.-

snLF-PaoPELLnn TANK on. annouisr For. MILITARY Usn.

To all whom 'it may concern:

Be it lmown that I, FREDERIC WILLIAM: CUNARD, a subject of the King of England, residing at 22 Melville Place, Myrtle-and Oxford streets, Liverpool, in the county of Lancaster, England, engineer, have invented certain new and useful Im rovements 1n or Relating to Self-Pro lle Tanks or Redoubts for liilitary se, of which the following' is a specification.

This vention relates 4to self-propelled tanks or redoubts for military use,`and has for its main object to' provide means whereby a tank or redoubt-bodymay be at will raised, in relation to its track or ound level, in`order to facilitate or expe- 'te its passage over bog or marsh land, or

'ground pitted v'with shell holes; or lowered to reduce its visibility.

A further feature of the invention'is that duetoone end of the tank or redoubt being high and the other end low, and its mtof balancebeing at or near the center,

1t will climb and movein a facile manner over broken ground and obstructions such as barbed wire entanglements.

' Fig. 2 isa front viewof t e tankorredoubt, 'the body being lowered for the pur'ose of reducingits visibility to enemy artlivery. 1g redoubt, the body being raised to. facilitate .or expedite-its passa e over-bog or marsh land, or ground pitte with shell holes,

Fig. 4 1s a view of a grid adapted to be opened and closed from the inside. Grids of this type are iitted in the roof or top of the tank or redoubt and the upper part of the sides, for the purpose of ventilation and admission of light.

Fig. '5 is a; front view of the tank or l i redoubt provided with a bomb deflecting roof or top.

Figs. 6 and 6 re resentI 1n side elevation the tank.or redou t, the side armor plates Specication of Letters Ilatent.

."3 is a front viewl of the tank .or

A fashioned track chassis and hand lpro frame glrders,

and caterpillar-track chains being removed to expose emergency mechanism adapted to propel the structure in theevent of loss of one or both of the caterpillar-track chains'. Figs..7 and 7a represent in plan view the tank or redoubt after the removal of the top .or roof and the upper portion ofeach caterpillar-track chain. Fig. 8 is a plan view 'of an 'internal combustion engine suitable for employment when a single e the tank or re oubt.

tails :A l

Fig. 9 is a plan ofthefront portion of a caterpillar-track chain, side rollers, water-tight plates and a side secv (left hand side) Fig.,14, and Fig.- 16 is a view taken 'as on hne A. B. (ri ht hand side) Fig. 14, of some of the toot ed gearingemployed in the change speed gear box. ig.17 is a plan view o the' steering wheel and ,parts connected therewith.

Figs. 9 to 23 "inclusive are enlarged ldet and F 10 an elevationv i Patented J une 8, 1920 Application ned August 15, 1919. serial No'. 317,840.

e only is used to propel of a preferred 'construction of' asv Fig. 18 1s 4a front view of an automatic lever carrier. A

Figs. 19, 19 isa plan and Fig..20 a side view of the low speed and reverse hand alever, gate slots, moving bar and lever shoe.

21, 21 1s a plan of the engine and second s barv and ever shoe.

Figs. 22, 22 is`a plan -.vierw of brake actuating hand lever.

-when steering ,the tank or redoubt.

- Fig. 24 is a 'side elevation of the s ee-lav e redoubt illustrated in my U. S. No. 1,262,926, April 16th, 1918, but provided with a caterpillar-track chain.

Fig. 2 5 is a plan and Fig. 26 a side view of a toothed fulcrumwheel.

1. (Figs. 1.: 1. 6. 6.) represent scales which indicate the difference in the turning axis height of the see-saw fashioned track.

2. (Figs. 1. 1. 2. 3. 5i 6. 6. 7 7*.) indicate the crank-like portions whereof (Figs. 2. 3.5. dotted lines) extend 'd hand lever, gate slots, moving atent l Fig. 23 indicates a seat for the operator.

- of the see-saw fashioned track and watertight plates 4.

2. (Figs. 1. 1*. 6. 6a 7. 7a.) indicate longitudinally disposed girders which are locked into the upper portions of the crank girders 2.

5 indicate upright V:trame supports for water-tight plates 4 which are interlocked into the axles or small ends of the girders 2: the upright frame supports 5 are provided on each side with lugs 6, (Figs. 1. 1. 6. 6*.) for supporting said axles of the crank girders 2, which are rovided on the upperpart with lugs or projections 8 (Figs. 7. 7a.) and upper and lower flanges 8*: for the prevention of lateral movement said flanges 8 are welded on the outside of the upright frame or supports 5: and to prevent'vertical -tank gun armor front 3", and the back displacement the rivets 7 (dotted lines) extend through the lug or projection 8, the upright frame .supporti and the upper flange 8, thus securing and making girders 2 and support 5 rigid and firm on the supporting lugs 6 (Figs. 1. 1*. 6.6). 2h (Figs. 7. 7.) indicate half-hoop upper and lower stays disposed around drawn tubes 9; said stays 2b are riveted or welded together and interlocked into the upright frame supports 5, the lugs or projections 8 on said stays 2b abutting against the inside of supports 5, while the anges 8a prevent lateral displacement of tubes 9 and stays 2b, thereby mak-l ing a rigid and firm double-T' fraine on each axle or small end of the crank girders 2 and on the stays 2": the tubes 9 (Figs. 1. 1. 6. 6a. 7. 7E.) extend into integral half-hoop flanges 10 (Figs. 1. 1a. 6. 6a.) on the under side of the axles or small ends of the crank girders 2. Y

l1 indicate half-hoop lower supports for the tubes 9 which are clamped and bolted to the flanges l0 on the under side of the axles or small ends of the crank girders 2: 12 indicate stop lugs for preventing longitudinal displacement of tubes 9: the back ends of tubes 9 extend over a keyway through a perforation in frame 24. Said frame 24 is securely fastened to the tubes 9 with the stop lugs 12 on one side and with the lock nuts 12 on the opposite side.

13. (Figs. l. la. 6. 6*. 7. 7a.) indicate tubes disposed inthe body of the structure- 3, said tubes are interlocked into the upright portion of the crank girders 2 which are prevented from moving laterally by being clamped and bolted down into perforations or bores 14 (Figs. 7. 7a) on the tubes 13, these perforations 14 and tubes 13 are on one side of the upper portions of crank girders 2 and on the opposite side of the upper portion of girders 2 the tubes 13 are bolted and locked with the nuts 15.

16 and 17 (Figs. 1. 1a. 6. 6a. 7. 7a) indicate supporting frames for the large dome wheel driving the caterpillar-track chain: the supporting frames 16 and 17 are clamped in on one side and bolted on the opposite side to. the axles or small ends of the crank girders 2: this completes the rigid skeleton see-saw track frame and body frame.

3. 3. indicate'the sides, top and bottom or flooring of the body of the structure which are plates riveted together.

3. indicates an anti-tank gun armor front riveted to the sides', top and bottom or floor- 1ng 3.

18. (Figs. 1. 1*. 6. 6. 7. 7*.) indica-te differential pulley blocks for ralsing and lowering the body of the structure 3, said blocks 18 are fastened on the cranks of the girlers 2, the longitudinal irders 2, and on the bottom or flooring of t e structure 3.

19. indicate rollers fastened to the antiplates 3.

20. (Figs. 7. 7. dotted lines) indicate rollers securely fastened to the sides and bottom or flooring of the structure 3, said rollers 19 and 20 are for eliminating friction and preventing lateral or longitudinal displacement.

When it is desired to raise Vor lower the body of the structure for the purpose of ex tricating the tank when in difficulties sa on bog, shell pitted or very swampy groun the endless chains passing around the differential pulley blocks 18 are pulled downward so revolving the upper blocks fastened to the crank girders 2, and the longitudinal girders 2l and revolvingk and lifting the lower pulley fastened to the bottom or floor-- ing of the body of the structure 3 to any de sired height up to its capacity.

21. (Figs. 7. 72) indicatedoors provided on the back of the structure 3 which open inward on' hinges 22, said doors are secured by means of the handles 23.

In the doors 21 or in any other part of the structure, apertures may be provided for guns, machine guns, flame throwers and latticed apertures for vision.

24. (Fig. 10.) indicates a front semicircular frame in which is formed a smooth grooved channel 25 (Fig. 9.) with side projections 26 (Fig. 10.) for preventing lateral displacement of the caterpillar-track chain when the rollers 27 (which are preferably provided With a casing of rubber or other suitable noiseless material) are moving on and over the smooth grooved channel 25: 28 (Fig. 9.) indicate spindleflinks, the spindles whereof extend through perforations on the rollers 27, spindle plates 29 and caterpillar flanges 30, and are riveted or pinned at 31: 32 indicate caterpillar plates with grooved channels and packing 33 on one side, and projections 34 (Fig. 10.) on the opposite side: said projections 34` extend into the grooved channel, and with packing 33form a4 double'- i web across each caterpillar plate 32 for reventing ingress of water: the caterp ar flanges are integralwith plates 32: 35 (Fig. 9,) indicates a double slotted channeled ange, the slotted channels runnin parallel with each other, the smaller slotte channel of flange receives the 'water-tight lates 4 which are riveted at 36 (dotted es) around the periphery ofthe track, the

larger slotted channel of flange 35 receiving the rollers 37 (which are preferably provided with an outside casing of rubber or other suitable noiseless material) andare held in position by the spindle bolt and nut 38 (dotted lines.)

39 (dotted lines) indicate lubrication pasl sages for the rollers 37': 40 and 41 indlcate outside and inside packindgl stri s provided respectively on the spin e bo t head and nut 38.and are for the reventio'n of inress of waterthrough t e sides of the ouble slotted channeled iange 35 while the rollers 37 are moving over the 'cate illar plates 32: 42 and 43 (Figs. 9. 10.) in cate arms of a stationary support for the cater- Y pillar-track chain' adjuster, the center orhorizontal arms 42 Flg. 9) are held in posi? tion by engagement in the slots 44 on the water-tight p ates 4, and the upper or perpendic ar arms 43 (Fig. 10) are held down -1n position by the cross stays 45 (Fig. 9.

which extend through a slot dotted lines on the upper and lower 46 gig. 1o pen 9) are welded on the outside of t e plates V4, lugs 47 (dotted lines) preventing lateral dis` placement of the support andarms 42 and 43; the stationary support ca the arms 42 and 43 has an internal screw-tiread 548 (dotted lines) through the center for the Vreception of thescrew 49, and is fastened .to the semi circular frame 24 (Fi A. 10)

i 10) arestrengthening stays on'the semi through va round perforation with t e lug or flange projection 50 and the collar and' pin 51; the screw 49 has also on it lock nuts .5.2 and a spanner square 53; 54 (Fig.'9. dotted lines) indicate integral slides on the frame 24 which moveinto the receiving'slide slots 55 on the water-tight plates 4: 56 (Fig.

circular frame 24.'

To adjust and tighten the caterpillartrack chain movin on and over the grooved channel 25, the loc nuts 52 are taken down the. screw 49 from three to six inches, a Spanner is placed on the square 53 and turned thereby moving screw 49 and pressing and turning the-lug or pro'ection 50 on the frame 24so projecting t e slides 54, the semi circular frame 24 and the rollers 27 of the caterpillar-track chain.

The rollers 37 have a clearance from the caterpillar plates 32 when the cater illartrack chain 1s turning on the front an back .which the two half slides 60 an 4to and from the nic es 68 and 68.-

r.; cular arms 43'; the cross sta s 45 (Fig.

vto the position ment has been ma e the screw 132 on the water: said slide slots 62 are riveted at 63' to the water-tight plate 4': each half slide 60 and 61, ri ht 'and left hand side respectively, have hal' shaftbores or perforations 64 (dotted lines) 'and the hal of a packing stri case 65 for hol tightly a large pac gfstrip 66,'with a single shaft bore or perforation: 67 indicate sp pms'inserted through the slide slots 60 and 6l for prevention of lateral movement: 68 and 68 v indicate niches on the upper slide slot 62 for the slides 60 and 61 to be moved to when an adjustment in the height of the structure' is'about to bemade: 69 indicate rings to facilitate themovin of the slides 60 and 61 D. etcetera denote the different A. B.C

heights to which the body of the structure' 3 may be moved, and correspond with similar markings over perforations for lock ins 'on the. uprlght portion of the crank 'r 2 in the body of the structure 3, and algsb correspond with similar mar and 'des on the screw 132 attached, to the c assis.

frame 125 in the body of the structure 3.

To open the water-tight packing slide, the sprmg'pinsI 67 are withdrawn, and the fingers thrust into the rings 69 on the slides 60 and 61 and moved to the niches 68, 68. This allows the small pinion wheel ersI 1-18 to move up or down on the large driven dome wheel 'when in mesh; alternatively theright hand side slide 60 may be -moved to the niche 68, this allows the small pinion wheel 118 to be .put out of vmesh with thealargedriven dome wheel 115 by turning the -screw 132 .on the. chassis frame 125; this is done before `adjusting the height-of the body of the structure 3 uired; after the adjustchassis frame 125 is turned, putting the small driving rinion wheel 118 intovmesh with the large iven dome wheel 115.-

70 (Fig. 13) indicates an engine' en d 4clutch shaft mounted on roller bearings 71; keyed on said shaft 70 is a driving pinion wheel 72 in constant mesh with a fulcrum pinion wheel 73; said pinion wheel 73 has on its right and left hand side anintegral small wheel 74 and bea 75, respectively, the whole of pinion wheel i3 beingmounted on loose ball bearings 76 which are inserted securely positioned by the shanki ofthe screw bolt 76"; said fulcrum pinion 73, 74 is mounted loosely on countershaft 77 but turns solidly forward from engine force without making a fulcrum, the fulcrum can only be made one way, that is when the wheel 74 is subjected to excessive load pressure then the pinion wheel 73, 74 -formsa crum on the countershaft 77 the wheel 74 integral with pinion 73 is in constant mesh with a transmission wheel 78 (Fig. 14); said wheel 78 is keyed on shaft 79, which is mounted on roller bearings 80 set into receptacles 81 in the gear box frame 82; said shaft 79 and roller bearings 80 are securely fastened in. with a collar and pin 83; 84 indicate clamping pieces for preventin lateral movement of the transmission w eels 78, 85, the'latter being keyed on shaft7 9, said transmission wheel 85 is in constantmesh with a small wheel 86 keyed on countrshaft 77 which is mounted on roller bearings 87 and roller bearing 88, which latter sustain the pressure of the fulcrum pinion wheel 73, 74 and prevent sagging of the countershaft 77, said shaft 77 and roller bearings 87 are securely positioned by means of collars and pins 89; 90, 'Llindicates the second-speed wheel keyed on the countershaft 77; 91 indicates the lowspeed wheel also keyed on countershaft 77 92 indicate clamping ieces for preventing lateral displacement o the gearing; 93 indicates a reverse speed transmission wheel keyed on countershaft 77 and in constant meshuwith a reverse speed wheel 94, which is mounted on roller bearings 95 and spindle 96 and is securely positioned by collar and pin 97 and clamping pieces 98: 99 (dotted lines) indicate keyways in shafts 70, 77, 79 and 101; 100 indicate rubber stops or other like material which insures nciseless meshing of the gears; clashing and grinding of. the ear wheels are obviated by the two wheels aving to contact with cushion stops before entering into mesh; 100a indicate beveled edges on each' tooth to facilitate the insertion of-one wheel into the other; 101 (Fig. 13) indicates a castellated shaft having one end constantly in the receptacle on the clutch shaft 70, and moving freely in either direction, said shaft 101 is securely positioned by means of the flange or stop lug 102 and is mounted on a double roller bearing 103; 104 indicates a meshing wheel mounted on shaft 101, and adapted to move freely thereon; said wheel 104 possesses rounded clutch teeth 105 for moving into similar receptacles 106 on the clutch shaft to effect a through drive from the engine; said wheel 104 also meshes with wheel 90 'for second-speed; 107 indicates a meshing g Wheel mounted on shaft 101 and adapted to move freely thereon; said wheel 107 meshes with wheel 91 for the low-speed and wheel 94 for the reverse speed, said wheels 104 and 107 have grooved projections 108 for carrying a gear moving fork 146;- 109 indicates a brake drum mounted on the propelling shaft 110;

indicate double grooved caps for preventing escapement of oil; 113 (dotted lines) indicate rivets; 114 indicate double ooves on the sides and bottom of the gear x 82 for preventing loss of oil.

When motion is conveyed to clutch shaft 70 it turns the driving pinion wheel 72, the

`fulcrum pinion wheels 73 and 74, transmission wheel 7 8, transmission wheel 85, small wheel86, and the countershaft 77. When motion is desired for the castellated shaft 101 and the propelling shaft 110, the lmeshing wheel 104 or 107 is moved by the fork 146 in. the grooved projection 108 and meshed with any of the desired speed wheels. On heavy loads being carried or steep gradients encountered beyond the normal capacity of the engine to propel the tank or redoubt, said fulcrum pinion 7 3--7 4 on the countershaft v7 7 automatically forms a fulcrum on shaft 77 when the'excessive load drags or tries to lstop the revolving of the gear wheels at wheel 74.

Referring now to the large dome wheel 115, the driving pinion wheel 118 and the frame supports 16, 17 (Figs. 1. 1. 6. 6. 7. 7*) 115 indicate large dome wheels in the see-saw fashioned track for propellin the caterpiller-track chain from a double rive,

the dome teeth of wheel 115 (Figs. 1. 1") meshing with the rollers 27 at the'top and bottom of said wheel 115'; the double drive is to facilitate the cate iller-track-chains movement and to lessen t e strain and likelihood of breaking; 116 indicate a double set of large ball bearings in the receptacles on the frame supports 16 and 17, on which the shaft 117 of the dome Wheel 115 is lmounted; 118 indicates a roller tooth driving pinion wheel, keyed 'and securely fastened to the propelling shaft 110 (Figs. 7. 7*) and in mesh with they large dome wheel 115 (Fi 1. 1a. 6. 6*. 7. 7*).

119 (Fig. 6sindicates a sprocket wheel; 120 indicaftes ball .bearings securely fastened into receptacles on the inner sides of the water-tight plates 4 (Figs. 7. 7) on' 111 (dotted lines) indicate brake shoes; 112

I theses-saw fashioned track for the rollers see-saw fashioned track; the sprocket wheel 119, the largev dome wheel 115 and the small caterpillar-track chain will insure the transit of the tank`or redoubt to safety and prevent the structure becoming a derelict; 122 (Fig. 1") indicates 'an extra bottom bearing if required in the center of 27 to move on; said rollers move o n the fastened b under-side of beari111 gv 122 in con'unction with the rollers 37 1g. 9). over w ich the caterpillar plates 32 travel.

123 (Figs. 1. .in

curely fastened A`through* the upright frame rails 127v to adjust and take out of mesh the driving pinion wheel 118 w Yen an adjustment in the height is made; said rails 1 27 are .firmly fastened to the flooring plate 3 with l rivets 128; said chassis frame 125 hashol'ding down rods 129 which enter the sliding slots 130, the latter are securely the vrivets 131 to the flooring plate 3; ro 129 preventing an u per movement of the chais frame-125 w en jolted, and the 'flange 'eral' movement; 132 indicates a lettered screw with niches .for guides unched on it,.to indicate the different heig ts and ad justments of the driving pinion wheel 118; said screw 132 is fastened tothe chassis frame 125 and moves through'an internalA screw thread on a stationary stand 133,

whichis securely fastened to the llooring plate 3 by rivets 134; 135 indicates .a spanthe body ofthe structure tion engines, onein each secure y fastene "justment by turning ner square.,

When an adjustment in the height of screw 132 is turned by a spa either before o r when'the adj|ustment is in progress; 'the chassisframe 125 'with 'the 126 moves tothe desiredadthe screw 132; 136 indicate two eight' cylinder internal combuschassis frame 125, for propelling the nklor redoubt and have on each crank shaft `of the motor of 136 clutch drums`137 for the insertion of clutches 138 fastened on the clutch shafts flange wheels lever shoe 140 which is integral 4with along floor lever 141 turning on a pivot 142 on the flooring iplate 3; 143 indicate selector bars movin .with rivets or bolts 145 to the half top cover of the gear box'82; each selector bar. 143 has'securelyfastened onv it a lever and gear moving .fork 146,

A6, 6*) indicate bottom strengthening cross stays which are sewheels 126 preventing lat-4 end an integral flange 3 .is .to be made,' nner at 135.

' foot pedal 162 (Fig. 17) and in thes nare slides 144 which are the latter extending through a slot cutout of the half top cover on the gear box 82 and en in the grooved projections 108 (Fig. 13% on the meshing wheels 104 and 107 (Fig. 13); levers of 146 (Fi 7. 7) engagingin the'lever shoes 147 an 148, sai lever shoes 147 and 148 are integral with lon floor levers 149 and 150 turning on the pivots 151 and 152. respectively on the iooring plate 3; 153 indicates alever shoe for actuating the cam in the brake shoes 111 (Figs. 13.. 14. dotted lines) on the inside of the brake drum 109 (Figs. 13. 14) said lever shoe` 153 (Figs. 7.- 7) is integral with alon .floor lever and chain 154 turning on thew eel 154n which is fastened to the flooring late 3; 154" indicate holding down ieces astened to the iiooring `plate 3. and lever mechanism on the floor may covered over witha thin lugged plate for -on the under side of the flooring plate 3 by a collar and pin, the column 156 is Asecured to and moves freely in the arms (shown broken) of the brackets 157 fastened to the anti-tank gun armor -front 3 (Fig. 7) thereby making the steering wheel' .155 (Fig. 17) and the column 156 firm in its position, the column 156 .has on the floor 158 bearin `and turnf ingon the iooring or bottom p ate 3; riveted to the flange. 158 is a cam 159 which has riveted to it an automatic lever car- .rier 160 with under lugs 161 (Fig. 18) for automatically carrying each floor lever 141 .(Fig..17 back into'position; 162 indicates a spring foot pedal with arms moving in the slots of the supports 163, the slotted support'is securely fastened to the ioorin plate 3; said arms of the spring foot peda 162 carry movable or swinging levers with floor rollers and slotted portions 164 attached, said slotted portions of 164 are for the reception of lugs 165 integral with the long ioor levers 141 (Figs. 7. 7) which actuate the clutches 138 (Figs. 7. 7*.)

When the foot is placed on the spring pressed down it actuates the .arms car the movable. or swinging levers of 164, which the rollers of 164 press outward the lon oor levers 141 an take out of the clutc the clutches 138 (Figs. 7. 7?.) When the foot pressure Ais relaxed on the spring Vfoot pedal 162 (Fig. 17 the lugs 165' having. moved into the slotted ortions of 164, automati cally carry the ong fioor levers 141 back into position, and. thereby help the clutch of the clutch 138 (Figs. 7. 7a) to move into and grip firmly the clutch drum. 137 (Figs. 7, 7 i) to take up the engine drive.

the whole of the' Steering'.

iio

drums137' 166 (Figs. 19. 19) indicate hand levers for working the low speed and reverse gears;

.are integral with the .long floor levers 150 (Figs. 7. 7?).

172 (Figs. 19. 19. 20) indicate gate slots which the hand levers 166 are laid into for neutral, low.speed and reverse, the said gate slots .172 holding the hand levers 166, the long ioor levers 150 (Figs. 7. 7a) and the meshing Wheels 107 (Fig. 13) in the; gear box 82 rigid and firm.

173 (Figs. 21. 21) indicate hand levers for meshing the engine andsecond speeds,

vsaid levers 173 are securely fastened on the bars 174 moving in the round slots 175, the latter are fastened to the flooring plate 3 with the rivets 176; hand levers 173 have each a small under arm 177 which moves and carries the lever shoe 178, said lever shoes 178 (Figs. 21. 21) are integral with the lon floor levers 149 (Figs. 7. 7*).

179 igs. 21. 21) indicate gate slots which the hand levers 173 are lald into for neutral, e 'ne and second speeds, the said gate slots 119 holding the hand levers 173, the long floor levers 149 (Figs. 7. 7) and the meshing wheels 104 (Fig. 13) in the gear box 82 rigid and firm.

When it is desired to actuate the hand levers 166 and 173, and change into different gate slots, said hand levers are brought to a perpendicular position, then slid over.

the bars to the desired slot and lowered into it. Y

180 (Figs. 22. 22) indicate hand levers for actuating the brake shoes 111 (Figs. 13. 14. dotted lines) in the brake drum 109 which is fastened on the propelling shaft 110 `(Figs. 13. 14) hand levers 180 (Figs. 22. 22) are fastened on bars 181 moving in round slotted pieces 182, 'which are fastened to the ooring plate 3 by rivets 183, said hand levers 180 have each a small under arm attached to the floor levers 154 (Figs. 7. 7*)

To actuate thev hand levers 180 (Figs. 22. 22) to put the brake on and to stop the machinery, said levers 180 are taken from the reclining position forward and pulled back, this movement turns the cam actuating the brake shoes 111 (Figs. 13. 14. dotted lines) said brake shoes 111 pressing against the inside of the brake drum 109 stops the propelling shaft 110 and caterpillar-track chain.

184 (Fig. 23) indicates a chair for the operator of the steering wheel, speeds and brakes, said chair 184 is put into tubes 185 (dotted lines) and securely fastened to the flooring plate.3; 186 indicate engine starting buttons; 187 indicate lighting and air fan buttons.

Before starting the engines 136 (Figs. 7. 7a) the steering operator opens the latticed vision bars 190 and seeing that the hand levers 166 and 173 (Figs. 19. 19. 21. 21) respectively are in neutral and the brakes off, he then touches the engine starting button 186 (Fig. 23) and when seated on the chair 184 (Fig. 23) the operator uts his foot on the spring foot pedal 162 ig. 17) pressing it down and thrusting out the lon floor levers 141 and the clutches 138 (Figs. 3.773) out of the clutch drums 137 Figs.

If it is desired to move the tank or redoubt forward in a straight line the hand levers 166 (Figs. 19. 19) are placed into the low speed slots of 172, this meshes in the gear boxes 82 the wheels 107 and 91 (Fig. 13) then the operator gradually relaxes the pressure on the spring foot pedal 162 (Fig. 17 bringing in the long floor levers 141 and putting the clutches 138 into the drums 137 (Figs. 7. 7*) and thereby turning the driving pinion wheel '118 (Figs. 1. 1. 7. 7*) dome wheel 115 and the caterpillar-track chain and tank or redoubt forward in a. straight line.

When it is desired to turn the tank or redoubt to the right the o erator turns the steering wheel 155 (Fig. 17 to the right, the

cam 159 (Fig. 17) thrusting out the long,"E

fioor lever 141 and the right hand sidmlOO clutch 138 (Figs. 7. 7) to disconnect the engine from the gear box mechanism and stop the right hand side caterpillar-track chain, this allows the left hand side engine and caterpillar-track chain to turn the tank or redoubt to the right or around a small radius; when the operator has turned to the right suiicientlor around, the steering wheel 155 (Fig. 1 is gradually turned to its former position (neutral) and by so doing the right hand side clutch 138 (Figs. 7. 7) is put into the clutch drum 137 Figs. 7. 7a) so connecting up the drive of the engine with the gear box mechanism to cause the caterpillar-track chain 'and tank or redoubt to move forward in a straight line.

When it is desired to turn to the left the same mani ulation is carried out as in the preceding escription, but reversing the manipulation of the gears,l the steering Wheel 155 (Fig. 17 is turned to the left, the cam 159 (Fig. 17 thrusting out the long floor lever 141' and the left hand side clutch 138l (Figs. 7. 7a) to disconnect the engine from the gear box mechanism and stop the left hand side caterpillar-track chain, this allows the right hand side engine and caterpillartrack chain to turn the tank or redoubt to the left or around a small radius. When the operator has turned to the left suiredoubt to the r' i. ing down ground.

iiecting same,

ciently or'around, the steering wheel 155 (Fig. 17) is gradually turned to its former osition (neutral) and so doing the left hand side clutch 138 igs. 7. 7) is put into the clutch drum 137 (Figs. 7. 7) so connecting up the drive vof the engine with the gear box'mechanism to cause the' caterpillartrack chain and tank or redoubt4 to move forward in a straight line; alternatively the operator may steer the tank, or ht or the left by gearing the right or the left hand side into a higher speed while running on the low speed, for example, if the operator desires to turn to the right he will turn the steering wheel 155 (Fig. 17) and 138 out of 137, (Figs. 7. 7) then hewlll ,take the left hand side hand lever 166 (F 1g. 19) liftit out of the low speed ate slot and slide it into the neutral slot of 1 2. He wlll then take the left hand side hand lever 173 (Fig. 21) and slide it into the second or -engme speed te slot of 179-; then the operator turns t e steering wheel 155 (F i 17 to its former position (neutral) wh1c puts the clutch '138 into the clutch drum 137, (Figs. 7. 7.) this will cause the caterpillar-track chain on the left hand side to turn much faster, and the tank or redoubt will turn to the right-without sto ping.

The reverse gear maybe used w en travelslipping slots on theycaterpillar plates 200' are not gripping the ound suiliciently and the tank or redou t is gaining momentum and b'eco out of contro through the cate illar p ates slip ing over4 the o reverse, the oot is pressed down on the spring foot pedal 162, (Flg. 17 thrusting l A 7. 7*) the hand levers 166 (Figs. 19. 19) are placed into the reverse slots of 172 to mesh the wheels 107 and 94 in the gear boxes'l 82, (Fig. 13) then the foot is taken off the spring foot pedal 162 (Fi 17 putting both clutches 138 into the c utch drums '137, (Fi 7. 7") this will'cause thereversing of t le caterpillar-track chains at each side. 188 (Fig. 5) indicates a half circle tube and,189,quarter circle tubes welded or bolted'lengthwise together, this is placed on the roof o the redoubt and securely fastened to the front, back and side plates 3a and 3 respectively, the quarter circles 189 are for bafiling the enemys air-craft bombs by desuch deiiection 'causing the point contact bombs to fall to the ound withoutexplosion. The half circle tube 188 `has squares cut out of it forthe reception of grids (Fig. 4) which have 0n -the inside for the admission of air and light sliding;

portions adapted to open and close, forme of thick translucent glass, metal and a space,

said grids (Fig.4) arelplaced on the top or roof and upper portions of the sides and take the left hand side clutch or vsteep grades if the nonout both clutches 138, (Figs.

'for raising and back in the body of the structure 3; said half circle tube 188 (Fig. 5') has a loop hole and latticed vision bars cut in it for the anti air-craft gun 195.

190 (Figs. 2. 5) indicates latticed vision bars shaded to open and close on the inside forthe steering operator; 191 and 192 indicates latticed vision bars shaded'to open and close on the inside for the gunners; 193 indicates loop holes for guns.

. 194 (Fig. 7) indicate mud Scrapers; 195 indicate an anti air-craft gun revolving on a cylinder or turret 196 and riveted to the flooring plate 3; 197 (Figs. 7. 7*) indicate rollers movingin receptacles for preventing the caterpillar track chains on the large dome wheels 115 from moving up, the receptacles containing the rollers 197 are securely fastened to the water-tight plates 4; 198 (Fig. 7) indicatesa quick firing gun and 199 a machine gun'.

200 (Fi 1. 2. 3. '5. 6. 7.) indicates anti tank gun eiectors securely fastened to the water-ti ht plates 4 to deiect and prevent anti tan gun fire from destroying the caterpillar-track chains while turnlng onthe smooth grooved channel 25 (Fig. '9) of the semi circle frame 24 (Figs. 9. 10)

'2oo- (F'ssl. 2. a. 5. e. 7) indicate son.

my invention or.

bmation in a tank or redoubt for mi ltary use, .of crank gi'rde-rs; an

elevator system supported by saidcranks Vfor raising andn'lowering the body of the structure; axles o n each crank girder; water-tight caterpillar plates and Watertight plates and chassis constructed as a see-saw fashioned track supported by. said crank girders; a rooffor Ibailiing and defleeting aircraft bombs; means designed to deflect frontal gunfire; grids 'adapted to open and. close provided inthe body of the structure; a small .emergency caterpillar-track chain on each side lof the seesaw -fashioned track; and mee-us adapted to actuatey said emergency caterpillar-track chains; f v

2. The combination in a tank or redoubt for military use, of crank girders an elevator system supported by said cranks lowering the body of the structure; v axles on eachcrank girder; water-tight caterpillar plates and watervdeflect frontal gun fire; grids adapted to open and close provided in the body of the structure; asmall emergency caterpillar` :track chain on each side of the 'see-saw fashioned track; and means adapted to actuate said emergency caterpillar-trackchains; a self prope led engine, double clutch drums on the crank shaft of said engine and in the gear boxesthereof; a fulcrum pinion wheel; and toothed Wheel transmission mechanism; gear with stops 'of noiseless material; steer- 15 ing mechanism; and material for preventing clanging and clashing noises in the machmery.

VIn Witness whereof I have hereunto set my hand this 17th day of July, 1919.

FREDERIC WILLIAM CUNARD.

Wtnesses:

LESLIE TAPLEY EDWARD J. Mc onMIcK. 

